Two possible sources to obtain the information on the number of learners in Grade 10 last year could be:
1. School or Educational Institution Records: The school or educational institution where the learners were enrolled should have records of student enrollment for each grade level. By accessing the school's records or contacting the administration, you can obtain the specific number of learners in Grade 10 from the previous year.
2. Department of Education or Education Authorities: Government education departments or local education authorities often collect and maintain data on student enrollment in schools. They may have centralized databases or reports that provide information on the number of learners in Grade 10 for various schools within their jurisdiction. Contacting the relevant department or authority and requesting the data could be a possible source.